Proposal and Proof-of-Principle Demonstration of Fast-Switching
Broadband Frequency-Shifting for a Frequency-Multiplexed Quantum Repeater
- URL: http://arxiv.org/abs/2010.06214v1
- Date: Tue, 13 Oct 2020 07:48:32 GMT
- Title: Proposal and Proof-of-Principle Demonstration of Fast-Switching
Broadband Frequency-Shifting for a Frequency-Multiplexed Quantum Repeater
- Authors: Peng-Cheng Wang, Oriol Pietx-Casas, Mohsen Falamarzi Askarani, and
Gustavo Castro do Amaral
- Abstract summary: We show that the expected frequency-shifting operation can be achieved in a nonlinear crystal.
The proposed frequency-shifting solution figures as a promising candidate for applications in frequency-multiplexed quantum repeater architectures.
- Score: 4.188761549219351
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: A proposal for fast-switching broadband frequency-shifting technology making
use of frequency conversion in a nonlinear crystal is set forth, whereby the
shifting is imparted to the converted photons by creating a bank of
frequency-displaced pump modes that can be selected by a photonic switch and
directed to the nonlinear crystal. Proof-of-principle results show that the
expected frequency-shifting operation can be achieved. Even though the
dimensions of the currently employed crystal and significant excess loss in the
experimental setup prevented conversion of single-photon-level inputs, thorough
experimental and theoretical analysis of the noise contribution allowed for the
estimation of the system performance in an optimized scenario, where the
expected signal-to-noise ratio for single-photon conversion and
frequency-shifting can reach up to 25 dB with proper narrow-band filtering and
state-of-the-art devices. The proposed frequency-shifting solution figures as a
promising candidate for applications in frequency-multiplexed quantum repeater
architectures with 25 dB output SNR (with 20\% conversion efficiency) and
capacity for 16 channels spread around a 100 GHz spectral region.
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